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NXP Semiconductors BZX284-B33,115
- Part No.:
- BZX284-B33,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-B33,115.pdf
- Description:
- DIODE ZENER 33V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:8,697
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Product details
Overview
BZX284-B33,115 from NXP Semiconductors is a ±2% tolerance, 33 V nominal Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 400 mW total power dissipation at 25 °C ambient, with 40 Ω typical differential resistance at 2 mA test current and 11 mV/K temperature coefficient - used for precision low-power voltage reference and overvoltage clamping in sensor signal conditioning circuits.
For engineers reviewing the BZX284-B33,115 datasheet, BZX284-B33,115 pinout, BZX284-B33,115 application, or BZX284-B33,115 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (315 K/W), reverse leakage (≤50 nA at 0.7 × VZnom), and SOD110 footprint compatibility with space-constrained PCB layouts.
Technical Context
The BZX284-B33,115 operates as a two-terminal silicon Zener diode optimized for stable voltage regulation in low-current (<2 mA) bias conditions. Its 33 V nominal Zener voltage is specified at IZtest = 2 mA, with differential resistance of 40 Ω (typ.) and 275 Ω (max.), enabling predictable clamping behavior under transient overvoltage events.
Designed for surface-mount assembly on standard FR-4 PCBs (11 × 25 × 1.6 mm), it exhibits a positive temperature coefficient of +11 mV/K and reverse capacitance of 60 pF at 1 MHz/0 V, making it suitable for DC reference and moderate-frequency protection where thermal drift and parasitic capacitance must be bounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 32.3–33.7 V at IZ = 2 mA; ensures tight regulation window for 3.3 V rail monitoring or 33 V supply sensing |
| Power Dissipation Ptot | 400 mW at Tamb = 25 °C; limits continuous clamp energy in low-duty-cycle surge suppression |
| Differential Resistance rdiff | 40 Ω (typ.), ≤275 Ω (max.) at IZ = 2 mA; defines output impedance and load regulation sensitivity |
| Temperature Coefficient SZ | +11 mV/K at IZ = 2 mA; quantifies VZ drift per degree, critical for temperature-stable references |
| Reverse Leakage IR | ≤50 nA at VR = 0.7 × VZnom (23.1 V); guarantees minimal quiescent current in high-impedance bias networks |
| Junction Temperature Tj | −65 to +150 °C; supports operation in industrial ambient environments without derating below −40 °C |
| Thermal Resistance Rth j-a | 315 K/W on standard PCB; determines junction-to-ambient temperature rise under 400 mW load |
Pinout & Package
SOD110 is a very small ceramic rectangular surface-mounted package with cathode identification mark on top surface; dimensions: 2.10 × 1.40 × 1.60 mm (L × W × H), 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node during reverse-bias regulation |
| Cathode (2) | Zener breakdown terminal / high-side connection | Connected to regulated voltage node; marked side on package top view |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate 33 V reference without post-calibration in factory-set analog circuits |
| 400 mW power rating in SOD110 | Supports robust transient clamping in space-limited consumer and industrial PCBs |
| +11 mV/K temperature coefficient | Allows predictable VZ compensation in temperature-critical sensor front-ends |
| ≤50 nA reverse leakage at 23.1 V | Minimizes error current in high-impedance voltage divider biasing networks |
| 60 pF junction capacitance at 0 V | Permits use up to ~10 MHz in filtering/clamping without significant signal attenuation |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Negotiation Reference |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 12-bit ADC inputs measuring 0–30 V battery packs in smart meters. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 33 V rail for op-amp biasing and ADC reference scaling. Use Value: ±2% VZ tolerance and +11 mV/K TC ensure <±0.5% full-scale error across −25 to +70 °C operating range. |
Use Scenario: Clamping CC line voltage during USB PD communication handshake in portable chargers. IC Role / Device Role / Timing Role: Overvoltage protector limiting CC pin to safe 33 V during 20 V PD negotiation bursts. Use Value: 40 Ω rdiff and 400 mW Ptot absorb 100 ms surges without thermal runaway or parameter shift. |
| Automotive Cabin Control Panel | IoT Node Power Sequencing |
|
Use Scenario: Regulating 3.3 V LDO input from 12 V vehicle bus using resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining stable bias point for linear regulator feedback network. Use Value: ≤50 nA IR prevents loading error in high-R divider (e.g., 1 MΩ/220 kΩ), preserving accuracy. |
Use Scenario: Enabling controlled power-up sequence for BLE SoC and flash memory in asset trackers. IC Role / Device Role / Timing Role: Voltage threshold detector triggering enable signal when main 3.7 V Li-ion reaches 33 V via boost converter. Use Value: 32.3–33.7 V VZ window provides clean 50 mV hysteresis margin against supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5263B-7-F | 33 V ±5%, 350 mW, SOT-23 package, 70 Ω rdiff (max) | Higher power derating required above 60 °C; larger footprint than SOD110 | Preferred where SOT-23 reflow compatibility is mandatory and ±5% tolerance acceptable |
| BZX84-C33 | 33 V ±5%, 300 mW, SOT-23, 90 Ω rdiff (max), −65 to +150 °C | Lower Ptot reduces surge handling; higher rdiff increases regulation error under load | Selected for cost-sensitive designs where 300 mW rating suffices and SOT-23 is already standardized |
Compared with MMBZ5263B-7-F and BZX84-C33, the BZX284-B33,115 delivers tighter ±2% tolerance, higher 400 mW rating in a smaller SOD110 footprint, and lower differential resistance - making it optimal for precision, space-constrained, and thermally demanding regulation tasks.
Availability
BZX284-B33,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power management, automotive cabin controls, and IoT node power sequencing requiring stable component supply and long-term obsolescence mitigation.
Supply support for BZX284-B33,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The BZX284 series was engineered for high-precision, low-power voltage regulation in miniaturized SMD applications - targeting design-in longevity, thermal stability, and consistent parametric performance across wide temperature ranges.
FAQ
What is the Zener voltage tolerance of the BZX284-B33,115?
The BZX284-B33,115 has a ±2% Zener voltage tolerance, meaning its nominal 33 V breakdown voltage is guaranteed between 32.3 V and 33.7 V when tested at 2 mA. This tight tolerance enables direct use in precision reference circuits without trimming or calibration, and is confirmed in Table 2 of the NXP datasheet for BZX284-B/C27 to B/C75 types.
What is the maximum power dissipation for the BZX284-B33,115?
The BZX284-B33,115 has a maximum total power dissipation of 400 mW at an ambient temperature of 25 °C, as specified in the Limiting Values table. Derating is required above 25 °C at 1.27 mW/°C (based on Rth j-a = 315 K/W), and this rating applies only when mounted on a standard 11 × 25 × 1.6 mm PCB per note 1 in the datasheet.
What package type does the BZX284-B33,115 use?
The BZX284-B33,115 uses the SOD110 package: a very small ceramic rectangular surface-mount device measuring 2.10 × 1.40 × 1.60 mm, with cathode identification marked on the top surface. This package is defined in the Package Outline section (page 8) and supports automated pick-and-place assembly in high-density layouts.
What is the differential resistance of the BZX284-B33,115 at its test current?
The BZX284-B33,115 has a typical differential resistance of 40 Ω and a maximum of 275 Ω at IZ = 2 mA, as listed in Table 2 of the datasheet. This value directly impacts regulation accuracy under varying load currents and is critical for calculating output voltage deviation in shunt regulator configurations.
How does the temperature coefficient affect the BZX284-B33,115's performance?
The BZX284-B33,115 has a temperature coefficient of +11 mV/K at IZ = 2 mA, meaning its Zener voltage increases by approximately 11 mV per degree Celsius rise in junction temperature. This positive TC is documented in Table 2 and must be factored into designs operating across −40 to +125 °C ambient ranges to maintain voltage accuracy.
BZX284-B33,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-110
BZX284-B33,115 FAQ
1.How can I place an order for BZX284-B33,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-B33,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX284-B33,115 reliable?
The price and inventory of BZX284-B33,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-B33,115 is usually 5 days.
3.What payment methods are accepted for BZX284-B33,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-B33,115 transactions.
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4.How is shipping managed for BZX284-B33,115?
BZX284-B33,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-B33,115 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX284-B33,115?
For technical support, including BZX284-B33,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-B33,115 requirements.
6.How does Aetrix verify that BZX284-B33,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-B33,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX284-B33,115 meets industry standards.
7.What is the process for return or replacement of BZX284-B33,115?
All BZX284-B33,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-B33,115, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX284-B33,115 part is unused and in its original packaging.
Return procedure for BZX284-B33,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-B33,115 Tags
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